Long wall

Definition of Long wall

(Coal Mining) a working in which the whole seam is removed and the roof allowed to fall in, as the work progresses, except where passages are needed.

See also: Long

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lonesomeness
Long
Long clam
Long cloth
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-Long wall-
long-acting
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Long-boned shad
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Long-legged plover
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long-playing
long-range
long-run
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